Kinetoscope
The Kinetoscope is an early motion picture exhibition device, designed for films to be viewed by one person at a time through a peephole viewer window. The Kinetoscope was not a movie projector, but it introduced the basic approach that would become the standard for all cinematic projection before the advent of video: it created the illusion of movement by conveying a strip of perforated film bearing sequential images over a light source with a high-speed shutter. First described in conceptual terms by U.S. inventor Thomas Edison in 1888, it was largely developed by his employee William Kennedy Laurie Dickson between 1889 and 1892. Dickson and his team at the Edison lab in New Jersey also devised the Kinetograph, an innovative motion picture camera with rapid intermittent, or stop-and-go, film movement, to photograph movies for in-house experiments and, eventually, commercial Kinetoscope presentations.
A Kinetoscope prototype was first semipublicly demonstrated to members of the National Federation of Women's Clubs invited to the Edison laboratory on May 20, 1891. The completed version was publicly unveiled in Brooklyn two years later, and on April 14, 1894, the first commercial exhibition of motion pictures in history took place in New York City, using ten Kinetoscopes. Instrumental to the birth of American movie culture, the Kinetoscope also had a major impact in Europe; its influence abroad was magnified by Edison's decision not to seek international patents on the device, facilitating numerous imitations of and improvements on the technology. In 1895, Edison introduced the Kinetophone, which joined the Kinetoscope with a cylinder phonograph. Film projection, which Edison initially disdained as financially nonviable, soon superseded the Kinetoscope's individual exhibition model. Numerous motion picture systems developed by Edison's firm in later years were marketed with the name Projecting Kinetoscope.
Development
An encounter with the work and ideas of photographic pioneer Eadweard Muybridge appears to have spurred Thomas Edison to pursue the development of a motion picture system. On February 25, 1888, in Orange, New Jersey, Muybridge gave a lecture amid a tour in which he demonstrated his zoopraxiscope, a device that projected sequential images drawn around the edge of a glass disc, producing the illusion of motion. Edison's laboratory was close by, and either or both Edison and his company's official photographer, William Dickson, may have attended. Two days later, Muybridge and Edison met at the Edison lab in West Orange and discussed the possibility of joining the zoopraxiscope with the Edison phonograph—a combination system that would play sound and images concurrently. No such collaboration was undertaken, but in October 1888, Edison filed a preliminary claim, known as a caveat, with the U.S. Patent Office announcing his plans to create a device that would do "for the Eye what the phonograph does for the Ear". It is clear that it was intended as part of a complete audiovisual system: "we may see & hear a whole Opera as perfectly as if actually present". In March 1889, a second caveat was filed, in which the proposed motion picture device was given a name, Kinetoscope, derived from the Greek roots kineto- and scopos.Edison assigned Dickson, one of his most talented employees, to the job of making the Kinetoscope a reality. Edison would take full credit for the invention, but the historiographical consensus is that the title of creator can hardly go to one man:
While Edison seems to have conceived the idea and initiated the experiments, Dickson apparently performed the bulk of the experimentation, leading most modern scholars to assign Dickson with the major credit for turning the concept into a practical reality. The Edison laboratory, though, worked as a collaborative organization. Laboratory assistants were assigned to work on many projects while Edison supervised and involved himself and participated to varying degrees.
Dickson and his then lead assistant, Charles Brown, made halting progress at first. Edison's original idea involved recording pinpoint photographs, 1/32 of an inch wide, directly on to a cylinder ; the cylinder, made of an opaque material for positive images or of glass for negatives, was coated in collodion to provide a photographic base. An audio cylinder would provide synchronized sound, while the rotating images, hardly operatic in scale, were viewed through a microscope-like tube. When tests were made with images expanded to a mere 1/8 of an inch in width, the coarseness of the silver bromide emulsion used on the cylinder became unacceptably apparent. Around June 1889, the lab began working with sensitized celluloid sheets, supplied by John Carbutt, that could be wrapped around the cylinder, providing a far superior base for the recording of photographs. The first film made for the Kinetoscope, and apparently the first motion picture ever produced on photographic film in the United States, may have been shot at this time ; known as Monkeyshines, No. 1, it shows an employee of the lab in an apparently tongue-in-cheek display of physical dexterity. Attempts at synchronizing sound were soon left behind, while Dickson would also experiment with disc-based exhibition designs.
The project would soon head off in more productive directions, largely impelled by a trip of Edison's to Europe and the Exposition Universelle in Paris, for which he departed August 2 or 3, 1889. During his two months abroad, Edison visited with scientist-photographer Étienne-Jules Marey, who had devised a "chronophotographic gun"—the first portable motion picture camera—which used a strip of flexible film designed to capture sequential images at 12 frames per second. Upon his return to the United States, Edison filed another patent caveat, on November 2, which described a Kinetoscope based not just on a flexible filmstrip, but one in which the film was perforated to allow for its engagement by sprockets, making its mechanical conveyance much more smooth and reliable. The first motion picture system to employ a perforated image band was apparently the Théâtre Optique, patented by French inventor Charles-Émile Reynaud in 1888. Reynaud's system did not use photographic film, but images painted on gelatine frames. At the Exposition Universelle, Edison would have seen both the Théâtre Optique and the electrical tachyscope of German inventor Ottamar Anschütz. This disc-based projection device, also known as the Schnellseher, is often referred to as an important conceptual source for the development of the Kinetoscope. Its crucial innovation was to take advantage of the persistence of vision theory by using an intermittent light source to momentarily "freeze" the projection of each image; the goal was to facilitate the viewer's retention of many minutely different stages of a photographed activity, thus producing a highly effective illusion of constant motion. By late 1890, intermittent visibility would be integral to the Kinetoscope's design.
The question of when the Edison lab began working on a filmstrip device is a matter of historical debate. According to Dickson, in mid-1889, he began cutting the stiff celluloid sheets supplied by Carbutt into strips for use in such a prototype machine; in August, by his description, he attended a demonstration of George Eastman's new flexible film and was given a roll by an Eastman representative, which was immediately applied to experiments with the prototype. As described by historian Marta Braun, Eastman's product
was sufficiently strong, thin, and pliable to permit the intermittent movement of the film strip behind lens at considerable speed and under great tension without tearing ... stimulat the almost immediate solution of the essential problems of cinematic invention.
Some scholars—in particular, Gordon Hendricks, in The Edison Motion Picture Myth —have argued that the lab began working on a filmstrip machine much later and that Dickson and Edison misrepresented the date to establish priority for reasons of both patent protection and intellectual status. In any event, though film historian David Robinson claims that "the cylinder experiments seem to have been carried on to the bitter end", as far back as September 1889—while Edison was still in Europe, but corresponding regularly with Dickson—the lab definitely placed its first order with the Eastman company for roll film. Three more orders for roll film were placed over the next five months.
Only sporadic work was done on the Kinetoscope for much of 1890 as Dickson concentrated on Edison's unsuccessful venture into ore milling—between May and November, no expenses at all were billed to the lab's Kinetoscope account. By early 1891, however, Dickson and his new chief assistant, William Heise, had succeeded in devising a functional strip-based film viewing system. In the new design, whose mechanics were housed in a wooden cabinet, a loop of horizontally configured 3/4 inch film ran around a series of spindles. The film, with a single row of perforations engaged by an electrically powered sprocket wheel, was drawn continuously beneath a magnifying lens. An electric lamp shone up from beneath the film, casting its circular-format images onto the lens and thence through a peephole atop the cabinet. The device incorporated a rapidly spinning shutter whose purpose—as described by Robinson in his discussion of the completed version—was to "permi a flash of light so brief that frame appeared to be frozen. This rapid series of apparently still frames appeared, thanks to the persistence of vision phenomenon, as a moving image." The lab also developed a motor-powered camera, the Kinetograph, capable of shooting with the new sprocketed film. To govern the intermittent movement of the film in the camera, allowing the strip to stop long enough so each frame could be fully exposed and then advancing it quickly to the next frame, the sprocket wheel that engaged the strip was driven by an escapement disc mechanism—the first practical system for the high-speed stop-and-go film movement that would be the foundation for the next century of cinematography.
On May 20, 1891, the first invitational demonstration of a prototype Kinetoscope was given at the laboratory for approximately 150 members of the National Federation of Women's Clubs. The New York Sun described what the club women saw in the "small pine box" they encountered:
In the top of the box was a hole perhaps an inch in diameter. As they looked through the hole they saw the picture of a man. It was a most marvelous picture. It bowed and smiled and waved its hands and took off its hat with the most perfect naturalness and grace. Every motion was perfect....
The man was Dickson; the little movie, approximately three seconds long, is now referred to as Dickson Greeting. On August 24, three detailed patent applications were filed: the first for a "Kinetographic Camera", the second for the camera as well, and the third for an "Apparatus for Exhibiting Photographs of Moving Objects". In the first Kinetograph application, Edison stated, "I have been able to take with a single camera and a tape-film as many as forty-six photographs per second...but I do not wish to limit the scope of my invention to this high rate of speed...since with some subjects a speed as low as thirty pictures per second or even lower is sufficient." Indeed, according to the Library of Congress archive, based on data from a study by historian Charles Musser, Dickson Greeting and at least two other films made with the Kinetograph in 1891 were shot at 30 frames per second or even slower. The Kinetoscope application also included a plan for a stereoscopic film projection system that was apparently abandoned.
Early in 1892, steps began to make coin operation, via a nickel slot, part of the mechanics of the viewing system. Before the end of the year, the design of the Kinetoscope was essentially complete. The filmstrip, based on stock manufactured first by Eastman, and then, from April 1893, by New York's Blair Camera Co., was 1 3/8 inches wide; each vertically sequenced frame bore a rectangular image, 1 inch wide by 3/4 inch high, and four perforations on each side. Within a few years, this basic format—with the gauge known by its metric equivalent, 35 mm—would be adopted globally as the standard for motion picture film, which it remains to this day. The publication in the October 1892 Phonogram of cinematographic sequences shot in the format demonstrates that the Kinetograph had already been reconfigured to produce movies with the new film.
As for the Kinetoscope itself, there have been differing descriptions of the location of the shutter providing the crucial intermittent visibility effect. According to a report by inventor Herman Casler described as "authoritative" by Hendricks, who personally examined five of the six still-extant first-generation devices, "Just above the film,...a shutter wheel having five spokes and a very small rectangular opening in the rim directly over the film. An incandescent lamp...is placed below the film...and the light passes up through the film, shutter opening, and magnifying lens...to the eye of the observer placed at the opening in the top of the case." Robinson, on the other hand, says the shutter—which he agrees has only a single slit—is positioned lower, "between the lamp and film". The Casler–Hendricks description is supported by the diagrams of the Kinetoscope that accompany the 1891 patent application, in particular, diagram 2. A side view, it does not illustrate the shutter, but it shows the impossibility of it fitting between the lamp and the film without a major redesign and indicates a space that seems suitable for it between the film strip and the lens. Evidently, that major redesign took place, as Robinson's description is confirmed by photographs of multiple Kinetoscope interiors, two among the holdings of The Henry Ford and one that appears in Hendricks's own book.
On February 21, 1893, a patent was issued for the system that governed the intermittent movement of film in the Kinetograph. The escapement-based mechanism would be superseded within a few years by competing systems, in particular those based on the so-called Geneva drive or "Maltese cross" that would become the norm for both movie cameras and projectors. The exhibition device itself—which, despite erroneous accounts to the contrary, never employed intermittent film movement, only intermittent lighting or viewing—was finally awarded its patent, number 493,426, on March 14. The Kinetoscope was ready to be unveiled.